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Topic Review (Newest First)

09-24-2011 08:55 PM

B-1

I ran out of memory & had to switch 'puters. Only 100 web pages open.

That's interesting Shine. I probably seem overly concerned to some people, but it's more comforting to know you've been doing this for a while and willing to share your setup. That makes it better to visualize what I want to shoot for and what to compare products to what is working effectively for others. I appreciate it. The internet and DIY craze seems to have driven prices up on safety equipment especially, compared to the actual value of the components; disrgarding the human factor in the equation.

I'll have to find the Nova 2000 page again. It seems like the air hose connected to the rear. That would be much better than drawing compressor air from the front. Seems that would be the safest part of the setup now that I think about it. Thanks Shine! I'll re-examine this. Big Rig sounds fun.

09-24-2011 07:47 PM

shine

i have a blasting booth and a pretty big rig. i have a nova 2000 helmet and a nylon/canvas suit. my old hood was nylon with a head set inside. they run on compressed air and pressurize the hood. no need for a mask . the nylon hood was not too expensive. been a while since i bought it. your going to find out any mask is going to make the job 10 times worse if it is warm at all. i will see if i can find the hood supplier. i think it came from my media supplier.
the one at northern is 150 and is close to the same. it is fed by a hose and belt.

09-24-2011 07:33 PM

B-1

All of the details on different systems were starting to run together in my head along with past experience of breathing rust with a half mask respirator. I think I would feel more comfortable with a completely sealed system for long term use.

When I restore my truck at some point and start stripping the frame, I'll have to better ventilate the garage and wait for the right time in late winter/early spring to use a scuba mask with oxygen and a hood or something to protect the lens. It takes me longer than the average person to do something like this and I want to feel at ease knowing I have the ultimate protection at a decent price.

I know guys do this all of the time with the cheapest of everything. Just get a little concerned about the sand blasting threads with guys posting 8 times and disappearing. hehe

Probably for the near future I'll use what Sam mentioned and see how comfortable I feel with it. I don't believe any blast media is completely safe but sure would make a tedious project easier. Gotta make it work because $50,000. to replace a truck is NOT acceptable.

What do use Shine, any thoughts?

09-24-2011 03:40 PM

shine

the hoods have air supply. there is no vacuum in a pressure hood. read the specs .

Yeah, I already took a scraper to what I could reach and will probably hit it again then follow with a wire brush on a die grinder. I did get a cheap hood at HF and I just order the P100? filtered respirator to use next week after my order comes in. You seem confident in that setup and sounds like a reasonable solution. Sounds good. Thanks.

09-24-2011 11:40 AM

OneMoreTime

check out Mine safety Equipment as they have a good selection of respirators for various uses..On the media some of the medias cut better then others and use less media. I also do as much as possible with sanders and grinders and save the blast for the hard to get areas..

Try those guys as their products are usually available from several local outlets so you can get replacement consumables easily. cartridges are a consumable item..I use a half mask and a hood my self when blasting..

09-24-2011 10:45 AM

B-1

I'm looking at this again and contemplating that there are a lot of crevices created at the shoulder area when moving about.

It seems there would be enough vacuum in that hood to draw in some silica dust and even rust. I'm thinking a better sealed system would be required even for any blast media. Well, at least to continue blasting for many more happy years. I know I'm not alone on this, but I breathed all of the rust I care to, even with a respirator. It looks like someone with the resources and ingenuity could do well even selling at decent affordable prices. Moreso probably.

09-24-2011 10:37 AM

B-1

That price was from a site found in a search engine for "Bullard Blast hood".

I know some of you quys have thought this over before. I have unintentionally breathed in oil and diesel mists and naturally avoided any connection to a oiled compressor. The e-tailers bold enough to give the price on the Bullard hood list @ $600+ for a hood and cape with 5 or so ft. of hose and a belt. "Request for a qoute" sounds like heavy middleman action on other sites. That is a little over in cost. Maybe they have a regulator or other components that might work in a DIY system though.

The scuba face shield could be protected further with a cheapo HF face shield, but yeah, eventually time would take it's toll. Maybe some drops of contact cement strategically placed and a sheet of plastic put over the lens or a combo of the two. Surely the other components would last as long as safety gear parts, but I've never used scuba gear myself to know of the build quality. Still seems to be feasible in my mind.

09-24-2011 09:25 AM

shine

buy a bullard blast hood and run off the compressor. scuba gear will last about 30 sec.

09-24-2011 09:19 AM

B-1

I know other people would like better protection but are put off by the costs of fresh air systems. I read another thread where someone mentioned scuba
masks. Here are some links that will maybe give others ideas to a tried and true system. I first thought Scuba a long time ago in relation to this topic, but never have researched it & discounted the idea because of oxygen tanks, but it may hold the answer. Some of the lower end items are cheaper than safety type apperati and from other posts, it appears that oxygen tanks are less expensive maybe to either purchase or rent. Silicone rubber hoods and masks are completely sealed and regulators are relatively inexpensive or quite expensive. It seems like this is a viable option:

Maybe instead of purchasing costly blast media all the time (except for aluminum or thinner parts), that money would be better spent on lower cost protective gear and cheaper blast media.

09-24-2011 08:12 AM

B-1

Sorry, I posted and then caught the words "intermittent use". That would be a very VERY bad idea with an unsealed mask.

09-24-2011 08:06 AM

B-1

I've been looking for a retailer for Starolite for a while now, it sounds like a great alternative to sand, but in the long term, & especially since no local access to the stuff (live close to Dupont plant, btw), I'm now the proud owner of 100 lbs. of sand. If I can get my long term system adapted to this and overcome the problem of finding an assortment of grits of sand for various material thicknesses and compressor psi adjustments, it would be a cheap solution. When I worked for Cummins years ago, we only used glass beads for engine parts, but I can get those locally at a greater cost of course, yet I'm thinking sand at the right grit and pressure will be a good alternative for machined surfaces.

As far as a reliable breating apperatus to safely use silica sand, I'm looking at the biggest cost for a full face mask. Next would be the cost of the hose. Interestingly, maybe the cheapest component to this system might possibly be the air pump. I'm "thinking out loud" here with the befit of someone corrceting my bad thinking. A commercial quiality air pump is over $1,000 USD. A hobby type system can be had for roughly $400. - $600. The commercial type pumps are rated at 3/4 HP (11 AMPS) to 1-1/2 HP (16 AMPS) and respectively 10 - 16 CFM with both @ 5 PSI. Maybe this is for more than one person, but if someone is breathing that hard to need a $!,000 1-1/2 HP @ 5 PSI air pump, maybe he can collect coins instead.

Why wouldn't an adapted 12v oiless air pump that is in the trunk of the car @ $40~ a pop, not supply one mask with sufficinet fresh air? Just need a foolproof regulator powered by a 110v AC to 12v DC converter thru, I don't know, say a 1/8" to 1/4" line (less weight / less cumbersome) and a retrofitted
mask to expell any excess air - maybe a switching mechanism for intermitent use.

This is the part I'm having the most trouble thinking through now, but I'm thinking with out a completely sealed mask, any excess pressure is continually vented out "weep holes" so no back draft of fumes/dust is possible unless the pump quits. This scenario is taking place out doors. I'll have to think on this some more but someone with the better solution will help.

I guess I'll order the respirator above for now and see what lies ahead on this idea, unless someone knows of a better respirator.

09-24-2011 07:03 AM

B-1

I've considered that. Waiting for a reply from a company that sells Dupont's Starolite under a different name variation. More expensive all the way around considering shipping on at least 50 lbs. Better short term safety; i.e. less breakdown into dust, or so I've heard. Sand would be great for the heavy parts ($2.00 per 50 lbs.) and more danger to me. I'm going to have to decide soon and get my orders in. Cooler weather is closing in on this project.

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